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| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2009-04-20 13:02:29 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-21 09:08:26 +0200 |
| commit | 39d83a5d684a457046aa2a6dac60f105966e78e9 (patch) | |
| tree | 839ea52f0e8b56f80ab790b0d6cee0d8988659bc /arch/x86/kernel/apic/apic.c | |
| parent | 25629d810a52176758401184d9b437fbb7f79195 (diff) | |
| download | lwn-39d83a5d684a457046aa2a6dac60f105966e78e9.tar.gz lwn-39d83a5d684a457046aa2a6dac60f105966e78e9.zip | |
x86: x2apic, IR: Clean up panic() with nox2apic boot option
Instead of panic() ignore the "nox2apic" boot option when BIOS
has already enabled x2apic prior to OS handover.
[ Impact: printk warning instead of panic() when BIOS has enabled x2apic already ]
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: dwmw2@infradead.org
Cc: Weidong Han <weidong.han@intel.com>
LKML-Reference: <20090420200450.425091000@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/apic/apic.c')
| -rw-r--r-- | arch/x86/kernel/apic/apic.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 2b30e520dce3..d32f5589f1dd 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -141,8 +141,12 @@ static int x2apic_preenabled; static int disable_x2apic; static __init int setup_nox2apic(char *str) { - if (x2apic_enabled()) - panic("Bios already enabled x2apic, can't enforce nox2apic"); + if (x2apic_enabled()) { + pr_warning("Bios already enabled x2apic, " + "can't enforce nox2apic"); + return 0; + } + disable_x2apic = 1; setup_clear_cpu_cap(X86_FEATURE_X2APIC); return 0; |